Fix receive and copayers views

public/views/copayers.html

@@ -20,7 +20,7 @@
                 <ion-spinner class="spinner-dark" icon="lines"></ion-spinner>
               </div>
             </div>
-            <div class="secret" ng-show="!isCordova">
+            <div class="secret">
               {{secret || ('Loading...'|translate)}}
             </div>
           </div>
@@ -29,11 +29,11 @@
 
       <div ng-show="secret">
         <div class="text-center m10t" ng-if="isCordova">
-          <span class="button outline round dark-gray tiny m0"
+          <button class="button button-outline button-positive"
             ng-click="shareSecret()">
-            <i class="fi-share"></i>
+            <i class="icon ion-ios-upload-outline"></i>
             <span translate>Share invitation</span>
-          </span>
+          </button>
         </div>
 
         <div class="m30v line-t">

public/views/tab-receive.html

@@ -9,7 +9,7 @@
   </ion-nav-bar>
   <ion-content>
     <div id="address">
-      <article class="text-center" ng-if="!wallet.isComplete()">
+      <article class="text-center" ng-if="wallet && !wallet.isComplete()">
         <div class="incomplete">
           <div class="title">
             <span translate>Incomplete wallet</span>
@@ -30,7 +30,7 @@
           </div>
         </div>
       </article>
-      <article ng-if="wallet.isComplete()">
+      <article ng-if="wallet && wallet.isComplete()">
         <div class="row backup" ng-show="!wallet.showBackupNeededModal && wallet.needsBackup" ng-click="goToBackupFlow()">
           <div class="m15t text-center col center-block">
             <i class="icon ion-alert"></i><span translate>Wallet not backed up</span><i class="icon ion-ios-arrow-thin-right"></i>